This book constitutes the refereed proceedings of the 17th International Conference on Mobile Web and Intelligent Information Systems, MobiWIS 2021, held as a virtual event, in August 2021. The 15 full papers presented in this book were carefully reviewed and selected from 40 submissions. The papers of MobiWIS 2021 deal focus on topics such as security and privacy; web and mobile applications; networking and communication; intelligent information systems; and IoT and ubiquitous computing.

This book deals with integrated Web, mobile, and IoT technologies. Novel approaches and techniques, new tools and frameworks are needed to address the increasing complexity of the distributed computing paradigms that are coming and the applications therein.This volume contains selected and extended papers from a) the Web Technologies track at the 33rd ACM/SIGAPP Symposium On Applied Computing, b) the Web Technologies track at the 32nd ACM/SIGAPP Symposium On Applied Computing, and c) the Software Development for Mobile Devices, Wearables, and the Internet-of-Things Minitrack at the 51st Hawaii International Conference on System Sciences. Overall, it provides a uniform view of cutting-edge research in Web, mobile and IoT technologies.